Skin tissue treatment apparatus



FIG. 1 is a back perspective view of a skin tissue treatment apparatus, showing my new design.

FIG. 2 is a front perspective view thereof.

FIG. 3 is a front view thereof.

FIG. 4 is a back view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a right side view thereof.

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the figures represent portions of the article which form no part of the claimed design. 

CLAIM The ornamental design for a skin tissue treatment apparatus, as shown and described. 